The computer whizzes at the University of Bristol have made a giant machine to show you how a computer works. And when we say giant, we mean it – it measures over 8 square metres!

“You cannot understand how a computer works by taking one apart”


The Big Hex Machine is a fully functional 16-bit computer. The designers aspire to expel confusion and make the fundamentals of computer architecture that little bit easier to comprehend. The machine is primarily targetted at students so it can be used as a physical aid to their learning.

The big helpful giant

08-big-hex-machine-4David May (pictured right, above), Professor of Computer Science in the Department of Computer Science (pictured right, above), designed the Big Hex Machine with education in mind. David says, “You cannot understand how a computer works by taking one apart!

“In our giant machine, all of the structure is clearly visible – as is the movement of information as it executes programs. It demonstrates the principle used in all computers – general-purpose hardware controlled by a stored program.”

The Big Hex Machine is mounted on a wall for all students to see. It has been built out of over 100 specially designed four-bit circuit boards to show the complexity of computers on a grander scale rather than the ordinarily minute versions.

Check out this teaser trailer from the University of Bristol

The Big Hex Machine has all the normal components of a computer: a processor, input and output devices, a custom-built LED matrix, a web-based application to control its operation, and a complete toolchain for students to write, build and execute their own software.

Demystifying the magic

Those who worked on the project said it was a very rewarding experience. Richard Grafton, Senior Creative Teaching Technologist in the Department of Computer Science (pictured in the centre, above), comments, “Building such a machine was not a trivial task.

“[The machine] demystifies the magic to something that everyone can understand”


“It’s a result of a great collaboration between students and staff and a real testament to persistence, commitment and teamwork. Most importantly, it’s an achievement of thinking a bit differently.”

Students at the University of Bristol also contributed to building the Big Hex Machine. Sam Russell, a third-year student who worked on the project (pictured left, above), adds, “It was exciting for me to almost cast myself back to the problems encountered by the original computer-building engineers.

“I literally put my blood, sweat and tears into something that is an artwork, an educational tool, a gigantic toy, a spark to reminisce of the old days, but most of all, something that demystifies the magic to something that everyone can understand.”

The official unveiling of the machine will take place at an event later this year – keep your eyes peeled for more details on this soon!

You can read more about the Big Hex Machine from the University of Bristol’s website and to keep up with the university’s latest news, follow them on Twitter: @BristolUni

Shona Wright

Shona covers all things editorial at TechSPARK. She publishes news articles, interviews and features about our fantastic tech and digital ecosystem, working with startups and scaleups to spread the word about the cool things they're up to. She also oversees TechSPARK's social media, sharing the latest updates on everything from investment news to green tech meetups and inspirational stories.